WEBVTT REPORTER: WITH EVERY PUNCH, BOB,AND WEAVE, THESE BOXERS AREDUKING IT OUT WITH PARKINSON'SDISEASE.>> THIS HAS BEEN A GAME CHANGER.IT HAS CHANGED MY ENTIRE WAY OFLIFE, QUALITY OF LIFE.>> ONE, TWO.REPORTER: THAT IS 66 YEARSOLD MIKE, DIAGNOSED 11 YEARSAGO.HE STAYED FOR THE SUPPORTSYSTEM.>> IT IS LIKE ANOTHER FAMILY.EVERYBODY IS SUPPORTIVE.REPORTER: THE FIGHTERS HERERANGE FROM 48 TO 83 YEARS OLDAND VARY IN SKILL LEVEL ANDMOBILITY.-75-YEAR-OLD DANGEROUS DENISEDALTON.>> I AM VERY DANGEROUS.REPORTER: THE YEAR OF TRAININGHERE HAS CHANGED HER OUTLOOK ONTHE FUTURE.>> THE PEOPLE I HAVE MET ARE THEKIND OF PEOPLE THAT JUST MAKEYOU FEEL SO GOOD INSIDE, YOUWANT TO BE PART OF THE GROUP.REPORTER: PARKINSON'S IS ADEGENERATIVE DISEASE, GETTINGWORSE OVER TIME.BOXING CHAMPION MUHAMMAD ALIFAMOUSLY DIED FROM THE DISEASE,BUT THIS TRAINER SAYS THENONCONTACT EXERCISE HERE HELPSSLOW THE DISEASE.>> WE HAVE TO GET YOU A TOUGHONE.YOU ARE FORCING THEM TO MAKE NEWNARROW PATHWAYS AND IT IS FUN,SO THEY ARE PUSHING IT.REPORTER: PUSHING FIGHTERS TOTHEIR LIMITS.>> SINCE I HAVE BEEN DOING THIS,I CAN SKIP.REPORTER: 40 PEOPLE, THREE TIMESA WEEK, A COMMUNITY OF FIGHTERS